This notebooks will help me talk through a bit of material regarding spatial data, with some introduction to spatial joins.

Key topics for today:

Packages

Standards:

library(knitr)
library(tidyverse)
library(janitor)
library(lubridate) # because we will probably see some dates
library(here) # a package I haven't taught you about before that doesn't do much, but ....
library(rnaturalearth)
library(WDI)
library(tigris)
library(rgdal)
library(sp)

Some additional packages focused on today’s work:

library(sf) # working with simple features - geospatial
library(tmap)
library(tidycensus)

Informational resources

Using the Neighborhood Geospatial Data (using /data)

Our first data source comes from opendata.dc

https://opendata.dc.gov/datasets/DCGIS::dc-health-planning-neighborhoods/about

I will use the GeoJSON file. (Newer, not necessarily better, but … a single file. Not smaller, but … this one is not big.)

Data is easily readable

neigh=st_read(here("analysis", "DC_Health_Planning_Neighborhoods_joey.geojson")) %>% clean_names()
Reading layer `DC_Health_Planning_Neighborhoods' from data source 
  `/Users/sarahkohls/Desktop/College Classes/Intro to Data Science/DS241-Class-Project/analysis/DC_Health_Planning_Neighborhoods_joey.geojson' 
  using driver `GeoJSON'
Simple feature collection with 51 features and 8 fields
Geometry type: POLYGON
Dimension:     XY
Bounding box:  xmin: -77.11976 ymin: 38.79165 xmax: -76.9094 ymax: 38.99556
Geodetic CRS:  WGS 84
class(neigh)
[1] "sf"         "data.frame"
plot(neigh)

Reminder - Joins

df1=tibble(fruit=c("apple","banana","cherry"),cost=c(1.5,1.2,2.25))
df2=tibble(fruit=c("apple","apple","cherry","lemon"),
           desert=c("pie","cobbler","cobbler","cheesecake"),
           cal=c(400,430,500,550))
df1
df2
left_join(df1,df2,by="fruit")

Investigating joining spatial and non-spatial data

Covid case information is available from opendatadc:

https://opendata.dc.gov/datasets/DCGIS::dc-covid-19-total-positive-cases-by-neighborhood/about

Read cases information:

df_c=read_csv(here("analysis"," DC_COVID-19_Total_Positive_Cases_by_Neighborhood_joey.csv")) %>% clean_names() 
Error: '/Users/sarahkohls/Desktop/College Classes/Intro to Data Science/DS241-Class-Project/analysis/ DC_COVID-19_Total_Positive_Cases_by_Neighborhood_joey.csv' does not exist.

Regular joining (of dataframes)

neigh2=left_join(neigh,df_cases,by=c("code")) 

tmap_mode("view")
tmap mode set to interactive viewing
tm_shape(neigh2) +tm_polygons("total_positives",alpha=.5)

Joining with other spatial data

Let’s get some data using tidycensus. Need an API key https://api.census.gov/data/key_signup.html



census_api_key("d44395e2fa101f82260fae6b845676d71f017b70")
To install your API key for use in future sessions, run this function with `install = TRUE`.
#what variables
v20 = load_variables(2018,"acs5")
# median_family_income="    B06011_001" 
# all "B00001_001"  
#black "B02009_001"

Get some data:

df_cencus=get_acs(geography = "tract",
                  variables=c("median_inc"="B06011_001",
                              "pop"="B01001_001",
                              "pop_black"="B02009_001"),
                  state="DC",geometry=TRUE,year=2018) 
Getting data from the 2014-2018 5-year ACS
Downloading feature geometry from the Census website.  To cache shapefiles for use in future sessions, set `options(tigris_use_cache = TRUE)`.
Using FIPS code '11' for state 'DC'
class(df_cencus)
[1] "sf"         "data.frame"
plot(df_cencus)

It’s in long format. Let’s make it wide.

df_cens=df_cencus %>% select(-moe) %>% spread(variable,estimate) 

tm_shape(df_cens) +tm_polygons("median_inc",alpha=.5)

  tm_shape(neigh2) +tm_borders(col="blue",lwd=5,alpha=.2)+
  tm_shape(df_cens) +tm_borders(col="red",lwd=1,alpha=.3)
```r
#<<<<<<< HEAD
#df_j=st_join(df_cens,neigh2)
#=======
#df_j=st_join(df_cens,neigh2,prepared=FALSE)
#>>>>>>> aaf01be5cf721819dd2df615aef7a1999bcec0c2

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```r
df_cens_adj=df_cens %>% st_transform(4326)
df_j=st_join(df_cens_adj,neigh2,largest=TRUE)
Warning: attribute variables are assumed to be spatially constant throughout all geometries

Other order?:

```r
#<<<<<<< HEAD
##df_j_rev = st_join(neigh2,df_cens_adj,largest=TRUE)
#=======
#df_j_rev = st_join(neigh2,df_cens_adj,largest=TRUE)
#>>>>>>> aaf01be5cf721819dd2df615aef7a1999bcec0c2

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Since we want the geometry for the NEIGHBORHOODS, we need a to work a little harder:


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```r
df1=df_j %>% select(median_inc,pop,pop_black,objectid) %>%
  group_by(objectid) %>%
  summarise(pop_n=sum(pop),
            pop_black_n=sum(pop_black), 
            adj_median_income=sum(pop*median_inc)/pop_n) 

plot(df1)

#df2=left_join(neigh2,df1)

df2=left_join(neigh2,df1 %>% st_set_geometry(NULL))
Joining, by = "objectid"
df2=df2 %>% mutate(black_perc=pop_black_n/pop_n, covid_rate=total_positives/pop_n)
tm_shape(df2)+tm_polygons(c("adj_median_income","covid_rate","black_perc"))
```r
df2 %>% filter(objectid!=30) %>% tm_shape()+tm_polygons(c(\adj_median_income\,\covid_rate\,\black_perc\),alpha=.4)

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#find where people ride bikes (bikes started in each 'district')

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```r
```r
bike_data <- read_csv(\202209-capitalbikeshare-tripdata.csv\) %>% clean_names()

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```r
```r
bike_data_sf <- bike_data %>%
  mutate_at(vars(start_lat, start_lng), as.numeric) %>%
  st_as_sf(
    coords = c(\start_lat\, \start_lng\), 
    agr = \constant\,
    crs = \4326\
  ) %>%
  sample_n(1000)

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```r
```r
st_crs(bike_data_sf)
st_crs(neigh2)

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```r
```r
st_crs(bike_data_sf) <- 4326

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```r
```r
bike_data_sf_1 <- bike_data_sf %>%
  select(geometry) %>%
  rename(geom_points = geometry)

neigh2_1 <- neigh2 %>%
  select(geometry)

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```r
```r
df_plz = st_join(bike_data_sf_1, neigh2_1, join = st_within)

#df_bikes_count <- count(as_tibble(df_plz), )

```

https://dw-rowlands.github.io/Job_Density_and_Commutes/Job_Density_and_Commutes.html

https://walker-data.com/census-r/index.html

What other interesting questions - is peak in bike data actually people going to work or tourist? - are casual riders in the more touristy areas? open data dc, tourist data, reverse geo coding to find location of monuments :):

Question to answer: Is there a spatial patter driven associated with member/casual? - look on open data dc site - could be some data on tourist activity

---
title: "Replacement Class - Cleaning up and Spatial Joins"
date:  "2022-11-09"
author: "Coach Skufca"
output: html_notebook
---

This notebooks will help me talk through a bit of material regarding *spatial data*, 
with some introduction to `spatial joins`.

Key topics for today:

* Using `sf` package
* Using `tmap` package
* Using `tidycensus` package
* Reminder on joins (focus: left join)
* Our Spatial Data
   * Neighborhoods
   * Joining with non-spatial data
   * Census data
   * Joining with spatial data
* ignore html in git  (if time)

## Packages

Standards:

```{r}
library(knitr)
library(tidyverse)
library(janitor)
library(lubridate) # because we will probably see some dates
library(here) # a package I haven't taught you about before that doesn't do much, but ....
library(rnaturalearth)
library(WDI)
library(tigris)
library(rgdal)
library(sp)
```

Some additional packages focused on today's work:

```{r}
library(sf) # working with simple features - geospatial
library(tmap)
library(tidycensus)

```
## Informational resources

* An overall resource on mapping in R: https://bookdown.org/nicohahn/making_maps_with_r5/docs/introduction.html
* A starting point to learn about `sf`:  https://r-spatial.github.io/sf/articles/
* Getting started with `tmap`: https://cran.r-project.org/web/packages/tmap/vignettes/tmap-getstarted.html
* The `tidycensus` package: https://walker-data.com/tidycensus/index.html
* The book on `tidycensus` : https://walker-data.com/census-r/index.html


## Using the Neighborhood Geospatial Data (using /data)


Our first data source comes from opendata.dc

https://opendata.dc.gov/datasets/DCGIS::dc-health-planning-neighborhoods/about


I will use the GeoJSON file.  (Newer, not necessarily better, but ... a single file.  Not smaller, but ... this one is not big.)  




Data is easily readable 
```{r}
neigh=st_read(here("analysis", "DC_Health_Planning_Neighborhoods_joey.geojson")) %>% clean_names()
class(neigh)
```

```{r}
plot(neigh)
```



## Reminder - Joins

```{r}
df1=tibble(fruit=c("apple","banana","cherry"),cost=c(1.5,1.2,2.25))
df2=tibble(fruit=c("apple","apple","cherry","lemon"),
           desert=c("pie","cobbler","cobbler","cheesecake"),
           cal=c(400,430,500,550))
df1
```
```{r}
df2
```
```{r}
left_join(df1,df2,by="fruit")
```

## Investigating joining spatial and non-spatial data


Covid case information is available from opendatadc:

https://opendata.dc.gov/datasets/DCGIS::dc-covid-19-total-positive-cases-by-neighborhood/about

Read cases information:

```{r message=FALSE, warning=FALSE}
df_c=read_csv(here("analysis"," DC_COVID-19_Total_Positive_Cases_by_Neighborhood_joey.csv")) %>% clean_names() 

df_cases=df_c %>%
  filter(as_date(date_reported) == "2022-02-22") %>% 
  separate(neighborhood,into=c("code","name"),sep = ":") %>%
  mutate(code=case_when(
    code=="N35" ~"N0",
    TRUE ~ code
  )) %>%
  select(-objectid,-date_reported)


```


## Regular joining (of dataframes)

```{r}
neigh2=left_join(neigh,df_cases,by=c("code")) 

tmap_mode("view")

tm_shape(neigh2) +tm_polygons("total_positives",alpha=.5)
```


## Joining with other spatial data

Let's get some data using `tidycensus`.  Need an API key   https://api.census.gov/data/key_signup.html


```{r}


census_api_key("d44395e2fa101f82260fae6b845676d71f017b70")

#what variables
v20 = load_variables(2018,"acs5")
# median_family_income="	B06011_001" 
# all "B00001_001"	
#black "B02009_001"
```


Get some data:

```{r}
df_cencus=get_acs(geography = "tract",
                  variables=c("median_inc"="B06011_001",
                              "pop"="B01001_001",
                              "pop_black"="B02009_001"),
                  state="DC",geometry=TRUE,year=2018) 
```

```{r}
class(df_cencus)
plot(df_cencus)
```
It's in long format.  Let's make it wide.
```{r}
df_cens=df_cencus %>% select(-moe) %>% spread(variable,estimate) 

tm_shape(df_cens) +tm_polygons("median_inc",alpha=.5)
```


```{r}

  tm_shape(neigh2) +tm_borders(col="blue",lwd=5,alpha=.2)+
  tm_shape(df_cens) +tm_borders(col="red",lwd=1,alpha=.3)
```



```{r}
#<<<<<<< HEAD
#df_j=st_join(df_cens,neigh2)
#=======
#df_j=st_join(df_cens,neigh2,prepared=FALSE)
#>>>>>>> aaf01be5cf721819dd2df615aef7a1999bcec0c2
```

```{r}
df_cens_adj=df_cens %>% st_transform(4326)
```

```{r}
df_j=st_join(df_cens_adj,neigh2,largest=TRUE)
```
Other order?:

```{r}
#<<<<<<< HEAD
##df_j_rev = st_join(neigh2,df_cens_adj,largest=TRUE)
#=======
#df_j_rev = st_join(neigh2,df_cens_adj,largest=TRUE)
#>>>>>>> aaf01be5cf721819dd2df615aef7a1999bcec0c2
```

Since we want the geometry for the NEIGHBORHOODS, we need a to work a little harder:

```{r}
df1=df_j %>% select(median_inc,pop,pop_black,objectid) %>%
  group_by(objectid) %>%
  summarise(pop_n=sum(pop),
            pop_black_n=sum(pop_black), 
            adj_median_income=sum(pop*median_inc)/pop_n) 

plot(df1)
```

```{r}
#df2=left_join(neigh2,df1)

df2=left_join(neigh2,df1 %>% st_set_geometry(NULL))

```

```{r}
df2=df2 %>% mutate(black_perc=pop_black_n/pop_n, covid_rate=total_positives/pop_n)
tm_shape(df2)+tm_polygons(c("adj_median_income","covid_rate","black_perc"))
```



```{r}
df2 %>% filter(objectid!=30) %>% tm_shape()+tm_polygons(c("adj_median_income","covid_rate","black_perc"),alpha=.4)
```
#find where people ride bikes (bikes started in each 'district')
```{r}
bike_data <- read_csv("202209-capitalbikeshare-tripdata.csv") %>% clean_names()
```

```{r}
bike_data_sf <- bike_data %>%
  mutate_at(vars(start_lat, start_lng), as.numeric) %>%
  st_as_sf(
    coords = c("start_lat", "start_lng"), 
    agr = "constant",
    crs = "4326"
  ) %>%
  sample_n(1000)
```

```{r}
st_crs(bike_data_sf)
st_crs(neigh2)
```

```{r}
st_crs(bike_data_sf) <- 4326
```

```{r}
bike_data_sf_1 <- bike_data_sf %>%
  select(geometry) %>%
  rename(geom_points = geometry)

neigh2_1 <- neigh2 %>%
  select(geometry)
```
  
```{r}
df_plz = st_join(bike_data_sf_1, neigh2_1, join = st_within)

#df_bikes_count <- count(as_tibble(df_plz), )
```


https://dw-rowlands.github.io/Job_Density_and_Commutes/Job_Density_and_Commutes.html

https://walker-data.com/census-r/index.html


What other interesting questions
- is peak in bike data actually people going to work or tourist?
- are casual riders in the more touristy areas?
open data dc, tourist data, reverse geo coding to find location of monuments :):

Question to answer:
Is there a spatial patter driven associated with member/casual?
- look on open data dc site
- could be some data on tourist activity

